Right now it's this. In reality, I have a really hot girlfriend...thirtysomething...much too young for me. This coming Friday she's having a party at her house. Her husband works nights, so he'll be asleep and home, but not attending. In my fantasy, I talk her into doing this...she goes into his room and tells him that I want to watch her suck him off. He's sort of kinky and I suspect bi, so he says ok. She sucks him and I watch. As things heat up, she rides his cock while I start to masturbate in front of them. Finally I join the fun and put my cock in his mouth while they're fucking. That whole scenario really turns me on for some reason.